<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>

<body>
    <div id="app">
        <router-link to="/home">主页</router-link>
        <router-link to="/product/123">产品详情1</router-link>
        <router-link to="/product/456">产品详情2</router-link>
        <router-view></router-view>
    </div>
</body>
<script src="./node_modules/vue/dist/vue.js"></script>
<script src="./node_modules/vue-router/dist/vue-router.js"></script>
<script>
    let routes = [{
        path: "/home",
        beforeEnter: (to, from, next) => {
            console.log("/home 路由的导航守卫");
            next();
        },
        component: () => Promise.resolve({
            template: `<h1>主页</h1>`,
            //路由进入之前
            beforeRouteEnter(to, from, next) {
                console.log("组件导航守卫 进入主页路由");
                next();
            },
            beforeRouteUpdate(to, from, next) {
                console.log("组件导航守卫 主页路由更新的时候");
                next();
            },
            //路由离开的时候
            beforeRouteLeave(to, from, next) {
                console.log("组件导航守卫 离开 /home 路由");
                next();
            }
        })
    }, {
        path: "/product/:productId",
        beforeEnter: (to, from, next) => {
            console.log("/product 路由导航守卫");
            next();
        },
        component: () =>
            import ("./Product.js")
    }]
    let router = new VueRouter({
            routes
        })
        //1-全局 前置导航守卫
    router.beforeEach((to, from, next) => {
        console.log("执行  全局的  前置的导航守卫");
        next();
        // to要去的页面 from从哪里来 next放行 
    })
    let vm = new Vue({
        router,
        el: "#app"
    })
</script>

</html>